chakra-core/ChakraCore

Hoisting a var declaration past a lexical declaration of the same name should be a SyntaxError

Open

#357 opened on 2016年2月19日

GitHub で見る
 (4 comments) (0 reactions) (0 assignees)JavaScript (1,374 forks)batch import
BugSeverity: 2help wanted

Repository metrics

Stars
 (9,000 stars)
PR merge metrics
 (30d に merged PR はありません)

説明

Second bullet point of block static semantics and similarly for function body static semantics.

E.g.

let x;
{
    var x; // error (already works)
    let y;
    var y; // should be an error (doesn't work)
    {
        var y; // should also be an error (doesn't work)
    }
}

This applies for var declarations hoisting past all lexical declarations, i.e. let, const, class, function (and generators and async functions).

コントリビューターガイド